Required Traits

Several Away Team missions contain locked reward nodes that can only be mastered if a crew member has a specific trait and is proficient in a certain skill.

Without such a crew member, the rare rewards at these nodes cannot be collected, and therefore the Elite and Epic  levels for these missions cannot be unlocked.

So before you airlock a crew member, you'd better check this table. If you're playing for the long term, consider starting at the bottom of the list, but be warned: spoilers. This is a manually created list, so if you don't see a character that should be listed, go ahead and add them. No guarantees that everything is up to date.